.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--warm-white);
  border-bottom: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 64px;
  padding-block: var(--space-2);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
  min-width: 0;
}

.site-header__logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  flex-shrink: 0;
}

.site-header__brand-text {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.2;
  color: var(--ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background-color: transparent;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.site-header__toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--ink);
  border-radius: 1px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(2) {
  opacity: 0;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-header__toggle:hover {
  background-color: var(--sky-20);
}

.site-header__toggle:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

.site-header__nav {
  flex: 1;
  min-width: 0;
  display: flex;
  justify-content: center;
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header__nav-item {
  margin: 0;
  padding: 0;
}

.site-header__nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--text-body-sm);
  line-height: 1.2;
  color: var(--ink);
  white-space: nowrap;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.site-header__nav-link:hover {
  color: var(--ink);
  background-color: var(--sky-20);
}

.site-header__nav-link:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.site-header__action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--ink);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
  position: relative;
}

.site-header__action:hover {
  background-color: var(--sky-20);
}

.site-header__action:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

.site-header__icon {
  width: 20px;
  height: 20px;
}

.site-header__cart-count {
  position: absolute;
  top: 2px;
  right: 2px;
  min-width: 18px;
  height: 18px;
  padding: 0 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--coral);
  color: var(--ink);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 11px;
  line-height: 1;
  border-radius: var(--radius-pill);
}

@media (max-width: 1023px) {
  .site-header__inner {
    flex-wrap: wrap;
    min-height: 56px;
  }

  .site-header__brand {
    flex: 1;
    min-width: 0;
  }

  .site-header__logo {
    width: 32px;
    height: 32px;
  }

  .site-header__brand-text {
    font-size: 17px;
  }

  .site-header__toggle {
    display: flex;
  }

  .site-header__nav {
    flex-basis: 100%;
    order: 3;
    display: none;
    background-color: var(--warm-white);
    border-top: 1px solid var(--line);
    max-height: calc(100vh - 56px);
    overflow-y: auto;
    padding: var(--space-3) 0;
  }

  .site-header__nav.is-open {
    display: block;
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0 var(--container-pad-mobile);
  }

  .site-header__nav-item + .site-header__nav-item {
    margin-top: var(--space-1);
  }

  .site-header__nav-link {
    display: flex;
    width: 100%;
    min-height: 44px;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-body);
  }

  .site-header__actions {
    gap: var(--space-1);
  }
}

@media (min-width: 1024px) {
  .site-header__nav {
    display: flex;
  }

  .site-header__toggle {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header__toggle-line {
    transition: none;
  }
}